There is an old acacia tree in the factory area. Ancient people worshiped and planted Sophora japonica, and regarded the Sophora japonica tree as the object of worship. They believed that the Sophora japonica tree was a wood spirit that was extremely spiritual and could bring blessings to people. The locust tree not only has lush and elegant branches and leaves, but also has hard wood. It can be thousands or even thousands of years old and is known as the longevity tree. The locust tree is an auspicious tree species. There is a folk proverb: A locust tree in front of the door either attracts treasure or brings wealth. Locust trees are the essence of spiritual stars and are beneficial to people. Therefore, folk tradition believes that the locust tree is the tree god, and planting a locust tree in front of the door is a wish to make money. There were three locust trees planted outside the palace of the Zhou Dynasty. When the three princes met the emperor, they stood under the locust tree. Therefore, later generations compared the three locust trees to the three princes. They hoped that their children would be among the three princes, so locust trees were planted in the Imperial Academy and Gongyuan of all dynasties.